Soldering iron



FIG. 1 is a perspective view of a soldering iron showing my new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is an enlarged view of portion 9 shown in FIG. 1;

FIG. 10 is an enlarged top plan view of the soldering iron; and,

FIG. 11 is an enlarged bottom plan view of the soldering iron.

The broken lines in the drawings depict portions of the soldering iron that form no part of the claimed design. 

CLAIM The ornamental design for a soldering iron, as shown and described. 